Book excerpt: The Tripartite Matrix in the Developing Theory and Expanding Practice of Group Analysis explores the social unconscious in persons, groups and societies in terms of the "un-acknowledged" restraints and constraints of our social and cultural groupings. In this context, Earl Hopper and an international team of contributors elucidate the theory and concept of the tripartite matrix as a tool for the deeper understanding of the human condition and for clinical work in various settings. They consider topics ranging from envy to intersectionality, and from addiction to the inability to mourn. The Tripartite Matrix in the Developing Theory and Expanding Practice of Group Analysis will be of great interest to group analysts, psychoanalytical group therapists, psychoanalysts and psycho-dramatists, as well as to social scientists more generally. Its extensive bibliography will be of particular value to students.